Your missing the point.
Theres still a huge market of non 64bit machines.
For instance Intels best selling centrino with the Dothan And Yonah Processors, they are quick little processors more than capable of running HD content, my laptop (Using a Yonah 1.6ghz overclocked to 2.4ghz), only has a max resolution of 1280x800 (Widescreen). I for one wish to watch HD content on the move, but I am not going to buy a completly new machine to do it. And you might have baught a dell with a maximum resolution of 1600x1200 BUT alot of people wouldnt have bothered with a screen that large, because it wastes space. My Desktop machine only has a 17" monitor, because I want more desk space, and being a gamer, its CRT. (I really dont like LCD for games I dont care what anyone says, personal preferance).
And now it looks like HD content will be able to run on a 32 bit system so meh.
And if someone can afford a 3000 dollar system, with a 64bit processor, 1gb of ram and a Radeon graphics card, well, they can obviously afford a HD TV of some kind. (I'm Australian, so things SEEM more expensive here).